Rabei Osman Sayed Ahmed

Rabei Osman Sayed Ahmed, also known as Mohamed al-Masri, was a member of Al-Qaeda who was a participant in the 2004 Madrid train bombings.

Biography
Rabei Osman Sayed Ahmed was born in Egypt and joined Al-Qaeda, and was a mastermind of the 2004 Madrid train bombings, coming up with many ideas in the planning stages of the attack. He was arrested in Milan, Italy in 2005 by a joint anti-terror force from Spain, Italy, France, and Belgium, but was acquitted in 2008.